On 03/08, Tejun Heo wrote:>> The stopped notifications in do_signal_stop() and exit_signals() are> always for the completion of job control. The one in do_signal_stop()> may be delivered to the ptracer if PTRACE_ATTACH races with> notification and the one in exit_signals() if task exits while> ptraced.>> In both cases, the notifications are meaningless and confusing to the> ptracer as it never accesses the group stop state while the real> parent would miss notifications for the events it is watching.>> Make sure these notifications always go to the real parent by calling> do_notify_parent_cld_stop() with %false @for_ptrace.